I use Unity with restored systray from timekiller repository. I had no problems with it until there was an update in proposed repository. I realized my mistake and downgraded it because it was really slow on my workstation.

Since this time I have been suffering from problem described in topic. In addition, when systray disappears, Dash starts being slow like proposed version was. I tried to disable detection of screen refresh rate and all other hints I found (see how to increase Unity performance), but this helps neither to increase it's speed nor to solve the main problem.

The only workaround I have is to run unity --replace &. Then systray appears again and everything is fine until it disappears.

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This describes a problem that can't be reproduced that seemingly went away on its own or was only relevant to a very specific period of time. It's off-topic as it's unlikely to help future readers." – Danatela, Luis Alvarado